UPDATE, 12:24 PM: The final XXX Summer Olympics (17.6/29) numbers from last night are in and it’s both a Silver and a Gold Medal for NBC. It’s a Silver because last night was still down from the big 21.8/35 that the first Tuesday of the Games received. However, it’s also a Gold because, with 30.1 million total viewers watching, the network’s primetime coverage of the London Games, last night was the best second Tuesday of any non-U.S. Summer Olympics since 1976 in Montreal. Tuesday night’s rating was up 8% over the comparable night of the 2008 Beijing Games and 12% over the second Tuesday of the 2004 Athens Games. Total viewership is up 11% over the comparable night of Beijing, which had 26.6 million, and up 20% from the comparable night of Athens, which had 25.0 million. Over on Telemundo, NBC’s sister Spanish language network, Tuesday was a bit of ratings history. The network’s noon to 2 PM broadcast of the soccer semifinal between Mexico and Japan on Tuesday was the highest rated telecast in the time slot in the network’s 28-year history. The match, which Mexico won, pulled in 1.4 million viewers on average and 713,000 in the Adults 18-49 demo.

PREVIOUS, 8:44 AM: The XXX Summer Olympics (9.3/27) is heading into the final stretch towards Sunday’s Closing Ceremony. April Ross and Jennifer Kessey’s win on Tuesday means it’s an all American Volleyball Gold final tonight as they face off against reigning champs and fellow Americans Missy May-Treanor and Kerri Walsh Jennings. However, in fast nationals estimates NBC’s primetime broadcast of the second Tuesday of the 2012 London Olympics was down a slapping 24% from last week. That decline still put London ahead of the 2008 Beijing Games. Last night’s broadcast was up 11% from the comparable night four years ago. NBC won the night among Adults 18-49 and in total viewers with 29.57 million.Over the first 12 nights of the Olympics, the London Games is up over the Beijing Games by 5% in the Adults 18-49 demo and 12% in total viewers. With the exception of ABC’s medical docudrama N.Y. Med (0.7/2) at 10 PM, it was all repeats last night on TV. Looks like that was to the advantage of the fifth episode of the eight-part Terence Wrong series. N.Y. Med was up 17% from last week.

Related: NBC Scores 10-Year Ratings High With London Olympics